minor symfony#20971 Update messenger.rst (berkesas)

This PR was submitted for the 7.2 branch but it was merged into the 6.4 branch instead.

Discussion
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Update messenger.rst

Typo fix from "may looks" to "may look"

Commits
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c6ae20a Update messenger.rst

Author: xabbuh

messenger.rst

@@ -1372,7 +1372,7 @@ RabbitMQ. Install it by running:
 
     $ composer require symfony/amqp-messenger
 
-The AMQP transport DSN may looks like this:
+The AMQP transport DSN may look like this:
 
 .. code-block:: env